The part that's the most fun is when the pick is so clean and so out of nowhere to the defender that after getting leveled they don't know how to respond. I've actually had guys apologize to me on the court, because it's confusing to them that they intentionally ran in to a wall. Last time I got a guy really good he apologized for bumping in to me and then mumbled to himself about not running around out of control and keeping his head in the game.
Great blind picks are never called out. The "value add" is that it sows dissension in the other team because guys get upset with their teammates for not calling them out.